161552237 has 8 divisors (see below), whose sum is σ = 201415872. Its totient is φ = 125884800.

The previous prime is 161552233. The next prime is 161552263. The reversal of 161552237 is 732255161.

161552237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161552237 - 2² = 161552233 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161552233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1048964 + ... + 1049117.

It is an arithmetic number, because the mean of its divisors is an integer number (25176984).

Almost surely, 2^161552237 is an apocalyptic number.

It is an amenable number.

161552237 is a deficient number, since it is larger than the sum of its proper divisors (39863635).

161552237 is a wasteful number, since it uses less digits than its factorization.

161552237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098099.

The product of its digits is 12600, while the sum is 32.

The square root of 161552237 is about 12710.3200982509. The cubic root of 161552237 is about 544.6334678830.

The spelling of 161552237 in words is "one hundred sixty-one million, five hundred fifty-two thousand, two hundred thirty-seven".